A 10" flywheel/clutch will fit, but you may have to do a little grinding inside the bellhousing for a 11" flywheel.

At least that's what I had to do with my 48 car bellhousing.
Not a lot of grinding and well worth the trouble to go with the larger flywheel and 12V starter.

You don't really want the small 216 flywheel/clutch on a 261 motor in a loaded truck...

There are 2 types of clutches to choose from.
If you go with the larger 11" flywheel get the 'Flat Diaphragm' type clutch with the many flat levers on the cover, just like the original was.
The 'Raised Diaphragm' 3-lever type 11" clutch is too large and will not fit the 216 bell housing.


On the road every day...
1952 Truck - 235
1948 Coupe - 261